I filled a tank with 7 gallons of water. 3 gallons leaked from the tank. How many gallons of water is left in the tank?
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My mom orders 5 pizza slices. We ate 2 slices. How many slices are left?
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5 birds are sitting on a tree. 4 of them flew away. How many birds will be left on the tree?
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A fish tank has 9 fishes. 3 of them have red fins and others have blue fins. How many fishes have blue fins?
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Laura invited 9 friends to her birthday party. Only 7 friends came to the party. How many friends didn't came to Laura's party.
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